an0

class Foo {
    
}

class Bar: Foo {
    
}

//let b: Bar? = nil
let b: Bar? = Bar()

an0

struct Foo {
    var i: Int = 0
}

var arr = [Foo(), Foo()]
print(arr)

for var a in arr {
    a.i = 1
}

an0

//
//  MultiDirectionAdjudicatingScrollView.swift
//  Khan Academy
//
//  Created by Andy Matuschak on 12/16/14.
//  Copyright (c) 2014 Khan Academy. All rights reserved.
//

import UIKit
import UIKit.UIGestureRecognizerSubclass